How to Repeat Each Row of a Data Frame in R Programming (Example Code)

In this article you’ll learn how to create (multiple) duplicates of each rows of a data frame in the R programming language.

Creating Example Data

data(iris)                                                  # Load data
head(iris)                                                  # Head of data
#   Sepal.Length Sepal.Width Petal.Length Petal.Width Species
# 1          5.1         3.5          1.4         0.2  setosa
# 2          4.9         3.0          1.4         0.2  setosa
# 3          4.7         3.2          1.3         0.2  setosa
# 4          4.6         3.1          1.5         0.2  setosa
# 5          5.0         3.6          1.4         0.2  setosa
# 6          5.4         3.9          1.7         0.4  setosa

Example: Creating One Duplicate of Each Data Frame Row

iris_updated <- iris[rep(seq_len(nrow(iris)), each = 2), ]  # Create repetitions
head(iris_updated)                                          # Head of updated data
#     Sepal.Length Sepal.Width Petal.Length Petal.Width Species
# 1            5.1         3.5          1.4         0.2  setosa
# 1.1          5.1         3.5          1.4         0.2  setosa
# 2            4.9         3.0          1.4         0.2  setosa
# 2.1          4.9         3.0          1.4         0.2  setosa
# 3            4.7         3.2          1.3         0.2  setosa
# 3.1          4.7         3.2          1.3         0.2  setosa

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